Wikipedia agrees with this one (though disagrees on the spelling... "Kvater is etymologically derived from the German Gevatter ("godfather")." en.wikipedia.org/wiki/Godparent#Judaism ... It is much less of a jump from Gevatter to kvater than it would be from Gottvater to kvater.
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SeanJAJan 19 '12 at 3:02

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@Seanja Gevatter could be the bridge between the two.
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Seth JJan 19 '12 at 3:09